Classification of antihistamines

CLASSIFICATION OF ANTIHISTAMINES

Classification H1 antagonists based on chemical structure

  • These drugs are classified into different groups based on their chemical class and also based on the sedation produced as side effect.
    • First generation
      • Ethanolamines – Eg: Diphenhydramine
      • Ethylenediamines - Eg: Triplenamine
      • Alkylamines - Eg: Chlorpheniramine
      • Piperazines - Eg: Cyclizine
      • Phenothiazines - Eg: Promethazine
    • Second generation
      • Alkylamines - Eg: Acrivastin
      • Piperazines - Eg: Terfenadine, Cetirizine

Classification based on sedation

    • First generation
      • High sedation - Eg: Diphenhydramine ,Dimenhydramine,Promethazine
      • Moderate sedation - Eg: Pheniramine, Antazoline, Trimeprazine, Cyproheptadine
      • Low sedation - Eg: Chlorpheniramine, Mepyramine
    • Second generation
      • No sedation - Eg: Terfenadine,Astemizole,Loratadine,Cetirizine
      • Anti vertigo - Eg: Cinnarizine
Last modified: Tuesday, 15 May 2012, 8:01 AM